<?php
/***********************************************************
 * Document Type: Classes
 * Update: 2006/11/06
 * Author: Akon
 * Remark: ZIP压缩文件类
 ***********************************************************/

class zip {

     var $datasec;
     var $ctrl_dir = array();
     var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
     var $old_offset = 0;
     var $dirs = Array(".");

     function get_List($zip_name) {
       $zip = @fopen($zip_name, 'rb');
       if(!$zip) return(0);
       $centd = $this->ReadCentralDir($zip,$zip_name);

        @rewind($zip);
        @fseek($zip, $centd['offset']);

       for ($i=0; $i<$centd['entries']; $i++)
       {
        $header = $this->ReadCentralFileHeaders($zip);
        $header['index'] = $i;$info['filename'] = $header['filename'];
        $info['stored_filename'] = $header['stored_filename'];
        $info['size'] = $header['size'];$info['compressed_size']=$header['compressed_size'];
        $info['crc'] = strtoupper(dechex( $header['crc'] ));
        $info['mtime'] = $header['mtime']; $info['comment'] = $header['comment'];
        $info['folder'] = ($header['external']==0x41FF0010||$header['external']==16)?1:0;
        $info['index'] = $header['index'];$info['status'] = $header['status'];
        $ret[]=$info; unset($header);
       }
      return $ret;
     }

     function Add($files,$compact) {
      if(!is_array($files[0])) $files=Array($files);

      for($i=0;$files[$i];$i++){
        $fn = $files[$i];
        if(!in_Array(dirname($fn[0]),$this->dirs))
         $this->add_Dir(dirname($fn[0]));
        if(basename($fn[0]))
         $ret[basename($fn[0])]=$this->add_File($fn[1],$fn[0],$compact);
      }
      return $ret;
     }

     function get_file() {
       $data = implode('', $this -> datasec);
       $ctrldir = implode('', $this -> ctrl_dir);

       return $data . $ctrldir . $this -> eof_ctrl_dir .
        pack('v', sizeof($this -> ctrl_dir)).pack('v', sizeof($this -> ctrl_dir)).
        pack('V', strlen($ctrldir)) . pack('V', strlen($data)) . "\x00\x00";
     }

     function add_dir($name) {
       $name = str_replace("\\", "/", $name);
       $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";

       $fr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
       $fr .= pack("v", 0 ).$name.pack("V", 0).pack("V", 0).pack("V", 0);
       $this -> datasec[] = $fr;

       $new_offset = strlen(implode("", $this->datasec));

       $cdrec = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
       $cdrec .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
       $cdrec .= pack("v", 0 ).pack("v", 0 ).pack("v", 0 ).pack("v", 0 );
       $ext = "\xff\xff\xff\xff";
       $cdrec .= pack("V", 16 ).pack("V", $this -> old_offset ).$name;

       $this -> ctrl_dir[] = $cdrec;
       $this -> old_offset = $new_offset;
       $this -> dirs[] = $name;
     }

     function add_File($data, $name, $compact = 1)
     {
       $name     = str_replace('\\', '/', $name);
       $dtime    = dechex($this->DosTime());

       $hexdtime = '\x' . $dtime[6] . $dtime[7].'\x'.$dtime[4] . $dtime[5]
         . '\x' . $dtime[2] . $dtime[3].'\x'.$dtime[0].$dtime[1];
       eval('$hexdtime = "' . $hexdtime . '";');

       if($compact)
       $fr = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00".$hexdtime;
       else $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00".$hexdtime;
       $unc_len = strlen($data); $crc = crc32($data);

       if($compact){
         $zdata = gzcompress($data); $c_len = strlen($zdata);
         $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2);
       }else{
         $zdata = $data;
       }
       $c_len=strlen($zdata);
       $fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
       $fr .= pack('v', strlen($name)).pack('v', 0).$name.$zdata;

       $fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);

       $this -> datasec[] = $fr;
       $new_offset        = strlen(implode('', $this->datasec));
       if($compact)
            $cdrec = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00";
       else $cdrec = "\x50\x4b\x01\x02\x14\x00\x0a\x00\x00\x00\x00\x00";
       $cdrec .= $hexdtime.pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
       $cdrec .= pack('v', strlen($name) ).pack('v', 0 ).pack('v', 0 );
       $cdrec .= pack('v', 0 ).pack('v', 0 ).pack('V', 32 );
       $cdrec .= pack('V', $this -> old_offset );

       $this -> old_offset = $new_offset;
       $cdrec .= $name;
       $this -> ctrl_dir[] = $cdrec;
       return true;
     }

     function DosTime() {
       $timearray = getdate();
       if ($timearray['year'] < 1980) {
         $timearray['year'] = 1980; $timearray['mon'] = 1;
         $timearray['mday'] = 1; $timearray['hours'] = 0;
         $timearray['minutes'] = 0; $timearray['seconds'] = 0;
       }
       return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) |     ($timearray['mday'] << 16) | ($timearray['hours'] << 11) |
        ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
     }

     function Extract ( $zn, $to, $index = Array(-1) )
     {
       $ok = 0; $zip = @fopen($zn,'rb');
       if(!$zip) return(-1);
       $cdir = $this->ReadCentralDir($zip,$zn);
       $pos_entry = $cdir['offset'];

       if(!is_array($index)){ $index = array($index);  }
       for($i=0; $index[$i];$i++){
         if(intval($index[$i])!=$index[$i]||$index[$i]>$cdir['entries'])
          return(-1);
       }

       for ($i=0; $i<$cdir['entries']; $i++)
       {
         @fseek($zip, $pos_entry);
         $header = $this->ReadCentralFileHeaders($zip);
         $header['index'] = $i; $pos_entry = ftell($zip);
         @rewind($zip); fseek($zip, $header['offset']);
         if(in_array("-1",$index)||in_array($i,$index))
          $stat[$header['filename']]=$this->ExtractFile($header, $to, $zip);

       }
       fclose($zip);
       return $stat;
     }

      function ReadFileHeader($zip)
      {
        $binary_data = fread($zip, 30);
        $data = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);

        $header['filename'] = fread($zip, $data['filename_len']);
        if ($data['extra_len'] != 0) {
          $header['extra'] = fread($zip, $data['extra_len']);
        } else { $header['extra'] = ''; }

        $header['compression'] = $data['compression'];$header['size'] = $data['size'];
        $header['compressed_size'] = $data['compressed_size'];
        $header['crc'] = $data['crc']; $header['flag'] = $data['flag'];
        $header['mdate'] = $data['mdate'];$header['mtime'] = $data['mtime'];

        if ($header['mdate'] && $header['mtime']){
         $hour=($header['mtime']&0xF800)>>11;$minute=($header['mtime']&0x07E0)>>5;
         $seconde=($header['mtime']&0x001F)*2;$year=(($header['mdate']&0xFE00)>>9)+1980;
         $month=($header['mdate']&0x01E0)>>5;$day=$header['mdate']&0x001F;
         $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
        }else{$header['mtime'] = time();}

        $header['stored_filename'] = $header['filename'];
        $header['status'] = "ok";
        return $header;
      }

     function ReadCentralFileHeaders($zip){
        $binary_data = fread($zip, 46);
        $header = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);

        if ($header['filename_len'] != 0)
          $header['filename'] = fread($zip,$header['filename_len']);
        else $header['filename'] = '';

        if ($header['extra_len'] != 0)
          $header['extra'] = fread($zip, $header['extra_len']);
        else $header['extra'] = '';

        if ($header['comment_len'] != 0)
          $header['comment'] = fread($zip, $header['comment_len']);
        else $header['comment'] = '';

        if ($header['mdate'] && $header['mtime'])
        {
          $hour = ($header['mtime'] & 0xF800) >> 11;
          $minute = ($header['mtime'] & 0x07E0) >> 5;
          $seconde = ($header['mtime'] & 0x001F)*2;
          $year = (($header['mdate'] & 0xFE00) >> 9) + 1980;
          $month = ($header['mdate'] & 0x01E0) >> 5;
          $day = $header['mdate'] & 0x001F;
          $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
        } else {
          $header['mtime'] = time();
        }
        $header['stored_filename'] = $header['filename'];
        $header['status'] = 'ok';
        if (substr($header['filename'], -1) == '/')
          $header['external'] = 0x41FF0010;
        return $header;
     }

     function ReadCentralDir($zip,$zip_name)
     {
      $size = filesize($zip_name);
      if ($size < 277) $maximum_size = $size;
      else $maximum_size=277;

      @fseek($zip, $size-$maximum_size);
      $pos = ftell($zip); $bytes = 0x00000000;

      while ($pos < $size)
      {
        $byte = @fread($zip, 1); $bytes=($bytes << 8) | Ord($byte);
        if ($bytes == 0x504b0506){ $pos++; break; } $pos++;
      }

     $data=unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',
            fread($zip, 18));

      if ($data['comment_size'] != 0)
        $centd['comment'] = fread($zip, $data['comment_size']);
        else $centd['comment'] = ''; $centd['entries'] = $data['entries'];
      $centd['disk_entries'] = $data['disk_entries'];
      $centd['offset'] = $data['offset'];$centd['disk_start'] = $data['disk_start'];
      $centd['size'] = $data['size'];  $centd['disk'] = $data['disk'];
      return $centd;
     }

     function ExtractFile($header,$to,$zip)
     {
       $header = $this->readfileheader($zip);

       if(substr($to,-1)!="/") $to.="/";
       if(!@is_dir($to)) @mkdir($to,0777);

       $pth = explode("/",dirname($header['filename']));
       for($i=0;isset($pth[$i]);$i++){
         if(!$pth[$i]) continue;
         if(!is_dir($to.$pth[$i])) @mkdir($to.$pth[$i],0777);
       }
      if (!($header['external']==0x41FF0010)&&!($header['external']==16))
      {
       if ($header['compression']==0)
       {
        $fp = @fopen($to.$header['filename'], 'wb');
        if(!$fp) return(-1);
        $size = $header['compressed_size'];

        while ($size != 0)
        {
          $read_size = ($size < 2048 ? $size : 2048);
          $buffer = fread($zip, $read_size);
          $binary_data = pack('a'.$read_size, $buffer);
          @fwrite($fp, $binary_data, $read_size);
          $size -= $read_size;
        }
        fclose($fp);
        touch($to.$header['filename'], $header['mtime']);

      }else{
       $fp = @fopen($to.$header['filename'].'.gz','wb');
       if(!$fp) return(-1);
       $binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']),
         Chr(0x00), time(), Chr(0x00), Chr(3));

       fwrite($fp, $binary_data, 10);
       $size = $header['compressed_size'];

       while ($size != 0)
       {
         $read_size = ($size < 1024 ? $size : 1024);
         $buffer = fread($zip, $read_size);
         $binary_data = pack('a'.$read_size, $buffer);
         @fwrite($fp, $binary_data, $read_size);
         $size -= $read_size;
       }

       $binary_data = pack('VV', $header['crc'], $header['size']);
       fwrite($fp, $binary_data,8); fclose($fp);

       $gzp = @gzopen($to.$header['filename'].'.gz','rb') or die("Cette archive est compress閑");
        if(!$gzp) return(-2);
       $fp = @fopen($to.$header['filename'],'wb');
       if(!$fp) return(-1);
       $size = $header['size'];

       while ($size != 0)
       {
         $read_size = ($size < 2048 ? $size : 2048);
         $buffer = gzread($gzp, $read_size);
         $binary_data = pack('a'.$read_size, $buffer);
         @fwrite($fp, $binary_data, $read_size);
         $size -= $read_size;
       }
       fclose($fp); gzclose($gzp);

       touch($to.$header['filename'], $header['mtime']);
       @unlink($to.$header['filename'].'.gz');

      }}
      return true;
     }
}